Board Thread:Pokémon Help/@comment-31386746-20170623115741/@comment-28826236-20170624061519

"If a Pokémon with this Ability uses a damaging move or is damaged by a damaging move, the other Pokémon's stat stages are ignored during damage and accuracy calculation.

Specifically, when a Pokémon with this Ability uses a damaging move, the evasion stat stages of the targets are ignored during accuracy calculation, and the Defense and Special Defense stat stages of the targets are ignored during damage calculation; when a Pokémon with this Ability is targeted by a damaging move, the accuracy stat stages of the attacking Pokémon are ignored during accuracy calculation, and the Attack and Special Attack stat stages of the attacking Pokémon are ignored during damage calculation. Unaware will not prevent the moves Stored Power, Punishment, and Power Trip from factoring in the stat changes that determine their power. This Ability has no effect on a Pokémon hurting itself in confusion."

~Bulbapedia